add/fix: Added arena implementation and cmake rework

Reviewed-on: #8

.gitignore

@@ -9,6 +9,7 @@ out/Release/
 
 # Cmake files
 CMakeCache.txt
+cmake
 CMakeFiles/
 cmake_install.cmake
 CTestTestfile.cmake

CMakeLists.txt

@@ -3,16 +3,8 @@ project(calculator VERSION 1.0 LANGUAGES C)
 
 set(CMAKE_C_STANDARD 11)
 set(CMAKE_C_STANDARD_REQUIRED ON)
-include(FetchContent)
 
-FetchContent_Declare(
-    arena
-    GIT_REPOSITORY https://laentropia-homelab.tail7368da.ts.net/laentropia/Arena.git
-    GIT_TAG main
-    SOURCE_DIR ${CMAKE_SOURCE_DIR}/external/arena
-)
-
-# Export compile_commands.json (para clangd)
+# clangd
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 add_compile_options(
@@ -21,15 +13,18 @@ add_compile_options(
     -Wpedantic
 )
 
+include(cmake/CPM.cmake)
 
-FetchContent_MakeAvailable(arena)
-
-add_library(arena STATIC
-    external/arena/src/arena.c
+CPMAddPackage(
+    NAME arena
+    GIT_REPOSITORY https://laentropia-homelab.tail7368da.ts.net/laentropia/Arena.git
+    GIT_TAG main
 )
 
-target_include_directories(arena
-    PUBLIC ${CMAKE_SOURCE_DIR}/external/arena/include
+CPMAddPackage(
+    NAME arraylist
+    GIT_REPOSITORY https://laentropia-homelab.tail7368da.ts.net/laentropia/ArrayList.git
+    GIT_TAG main
 )
 
 add_library(calculator_lib
@@ -43,18 +38,13 @@ target_include_directories(calculator_lib
     PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include
 )
 
+# 🔥 aquí está la magia
 target_link_libraries(calculator_lib
     PUBLIC arena
 )
 
 add_executable(calculator src/main.c)
-
 target_link_libraries(calculator calculator_lib)
 
-# ------------------------
-# Testing
-# ------------------------
-
 enable_testing()
 add_subdirectory(test)
-

src/parser.c

@@ -4,8 +4,6 @@
 #include <stdalign.h>
 #include <stdbool.h>
 #include <stdint.h>
-#include <stdlib.h>
-
 
 uint8_t node_lbp(ASTNode node) {
     if (node.type == NODE_INTEGER) {